"Web pages are becoming increasingly complex with more scripts, style sheets, images, and Flash on them. A first-time visit to a page may require several HTTP requests to load all the components. By using Expires headers these components become cacheable, which avoids unnecessary HTTP requests on subsequent page views. Expires headers are most often associated with images, but they can and should be used on all page components including scripts, style sheets, and Flash."
As written in Yslow.
my question is how much time would be good to set in expire header for a website which has multiple stylesheets, Flash headers, Javascripts, images, PDF, MS Excel files, PPT etc.?
If I want to set same expire time on all things.